Toilet tank fill valve



FIG. 1 is a top perspective view of a toilet tank fill valve showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a front elevational view thereof, the opposite side being a mirror image of the side shown. 

The ornamental design for a toilet tank fill valve, as shown and described. 